An unbelievably simple recipe today, but genuinely one of my all-time favourites. That's right – today we're making an Amaretto Sour.

Now before we get started, there are, of course, many ways to make this drink. You can serve it up, or on the rocks. You can include egg-white for additional body, and you can even bang in some bitters for additional complexity. The picture below is an example of an 'up' drink courtesy of 'The Art of the Shim', a superb book that I'll come back to at the end.

We're keeping it as simple as you like for this #MasterofCocktails version, however, which means you'll require just 2 ingredients: Lemon and Amaretto...